Bicycle Front Derailleur with Mounting Structure and Bicycle Frame with Front Derailleur Mounting Structure

ABSTRACT

A bicycle front derailleur includes a mounting member, a chain guide, and a linkage assembly that pivotally couples the mounting member to the chain guide. The mounting member is configured to be mounted to a first frame member of a bicycle frame. The first frame member is pivotally connected to a second frame member of the bicycle frame about a pivot axis. The mounting member includes an attachment portion through which a fixing bolt for fixing the mounting member to the first frame member passes and includes an abutment configured to restrict rotation of the mounting member around the fixing bolt. The attachment portion is located on a front side of the pivot axis when the mounting member is mounted to the first frame member. The bicycle frame includes a structure for engaging and supporting the mounting member.

BACKGROUND OF THE INVENTION

The invention generally relates to a bicycle front derailleur and abicycle frame especially adapted to be equipped with a rear suspension.More specifically, the present invention relates to a bicycle frontderailleur that is designed to be attached to a pivotal frame member,called a swingarm, including a chainstay, which is pivotal with respectto another frame member, such as a seat tube.

Front derailleurs are typically mounted to a bicycle frame near thebottom bracket hanger. However, in some frame configurations of modernbicycles, this is a crowded location, and it is sometimes difficult toavoid interference between a mounting member to mount the frontderailleur and other parts. For example, in a frame configuration inwhich the chain stays pivot with respect to a seat tube having thebottom bracket hanger, there may be interference between the mountingmember of the front derailleur and a pivot joint of the chain stays.

SUMMARY OF THE INVENTION

A bicycle front derailleur includes a mounting member configured to bemounted to a first frame member of a bicycle frame. The first framemember is pivotally connected to a second frame member of the bicycleframe about a pivot axis. The derailleur further includes a chain guideand a linkage assembly that pivotally couples the mounting member to thechain guide. The mounting member includes an attachment portion throughwhich a fixing bolt for fixing the mounting member to the first framemember passes and includes an abutment configured to restrict rotationof the mounting member around the fixing bolt by abutting the firstframe member. The attachment portion is configured to be located on afront side of the pivot axis when the mounting member is mounted to thefirst frame member.

In another aspect, the abutment is integrally formed with the mountingmember.

In another aspect, the first frame member is a chain stay of the bicycleframe, and the second frame member is a seat tube of the bicycle frame.

In another aspect, the attachment portion is an elongated openingextending in a longitudinal direction of the second frame member whenthe mounting member is mounted to the first frame member.

In another aspect, the abutment is one of a protrusion and an elongatedrecess, the first frame member includes the other of the protrusion andthe elongated recess, the protrusion and the elongated recess areconfigured to engage with one another, and the elongated recess extendsin a longitudinal direction of the second frame member when the mountingmember is attached to the first frame member.

In another aspect, the abutment is configured to be located on a frontside of the pivot axis when the mounting member is mounted to the firstframe member.

In another aspect, the mounting member is configured to be mounted to aconnecting portion of the first frame member.

In another aspect, the mounting member includes a reinforcement portion,which is located on a rear side of the attachment portion.

In another aspect, the reinforcement portion is formed without anyportion that allows a fixing bolt passing through to fix the mountingmember to the first frame member.

In another aspect, attachment portion extends below the chain guide.

In another aspect, a bicycle front derailleur includes a mounting memberconfigured to be mounted to a first frame member of a bicycle frame. Thefirst frame member is pivotally connected to a second frame member ofthe bicycle frame about a pivot axis. The second frame member includes abottom bracket hanger to which a bottom bracket is attached. Thederailleur further includes a chain guide and a linkage assembly thatpivotally couples the mounting member to the chain guide. The mountingmember includes a first attachment portion through which a first fixingbolt for fixing the mounting member to the first frame member passes andincludes a second attachment portion through which a second fixing boltfor fixing the mounting member to the first frame member passes. Boththe first and second fixing bolts are configured to be located on afront side of the pivot axis, when the mounting member is mounted to thefirst frame member.

A bicycle frame includes a first frame member and a second frame memberconfigured to be pivotally connected to the first frame member about apivot axis. The first frame member includes a threaded hole throughwhich a fixing bolt for fixing a mounting member of a bicycle frontderailleur to the first frame member passes and includes an abuttingportion configured to restrict rotation of the mounting member aroundthe fixing bolt by abutting the mounting member of the bicycle frontderailleur. The threaded hole is located on a front side of the pivotaxis.

In another aspect, the first frame member is a chain stay of the bicycleframe, and the second frame member is a seat tube of the bicycle frame.

In another aspect, a bicycle frame comprises a second frame member afirst frame member configured to be pivotally connected to the secondframe member about a pivot axis. The second frame member includes abottom bracket hanger to which a bottom bracket is attached. The firstframe member includes a first threaded hole through which a first fixingbolt for fixing a mounting member of a bicycle front derailleur to thefirst frame member passes and includes second threaded hole throughwhich a second fixing bolt for fixing a mounting member of a bicyclefront derailleur to the first frame member passes. The first and secondthreaded holes are In another aspect, the first frame member is a chainstay of the bicycle frame, and the second frame member is a seat tube ofthe bicycle frame.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a side view of a bicycle to which the front derailleur of thepresent invention is attached;

FIG. 2 is a partial diagrammatic perspective view of parts of thebicycle frame of the bicycle of FIG. 1;

FIG. 3 is a front view of the front derailleur;

FIG. 4 is a diagrammatic side view of the front derailleur and parts ofthe bicycle frame to which it is attached;

FIG. 5 is a partial rear view of a mounting member of the frontderailleur;

FIG. 6 is a partial diagrammatic perspective view of parts of thebicycle frame to which the front derailleur of a second embodiment ofthe present invention is attached;

FIG. 7 is a front view of the front derailleur of the second embodiment;

FIG. 8 is a diagrammatic side view of the front derailleur of the secondembodiment and parts of the bicycle frame to which it is attached; and

FIG. 9 is a partial rear view of amounting member of the frontderailleur;

FIG. 10 is a diagrammatic side view of a bicycle frame configured tosupport a front derailleur of a third embodiment; and

FIG. 11 is a diagrammatic side view of the front derailleur and parts ofthe bicycle frame to which it is attached in the third embodiment.

DESCRIPTION OF THE EMBODIMENTS

FIG. 1 shows a bicycle 10 that includes a seat 14, handlebars 18, aframe 22, a seat tube 26, chain stays 30, a bottom bracket 32, pedals34, a front wheel 38, a rear wheel 42, a chain 48, and a frontderailleur 54. For reference purposes, the bicycle 10 includes a centerplane 56 (See FIG. 3), which is perpendicular to an axis of the rearwheel 42, includes a center axis 58 of the seat tube 26 and extends in alongitudinal direction of the bicycle 10.

FIG. 2 shows portions of the bicycle frame 22. In FIG. 2, the rear ofthe bicycle 10 is toward the left, and the front of the bicycle 10 is tothe right. The generally vertical seat tube 26 includes a bottom brackethanger 60, to which the bottom bracket 32 is attached. The bottombracket hanger 60 connects the seat tube 26 and a down tube 62. Thebottom bracket 32 rotates about a bottom bracket axis 64. In thisembodiment, a pivot joint 72 is rigidly connected directly to the seattube 26. However, the pivot joint 72 can be indirectly connected to theseat tube 26; for example, the pivot joint 72 can be located on astructure extending from the seat tube or the bottom bracket hanger 60.Connecting portions 80 of the chain stays 30 are located at the frontends of the chain stays 30 and surround a pivot pin 84 of the pivotjoint 72. The pivot pin 84 is fixed securely to the second frame member108 by welding or other secure fastening method. Thus, the pivot joint72 pivotally supports the chain stays 30 with respect to the secondframe member 108, which is the seat tube 26 in this embodiment. Thechain stays 30 are pivotal about a pivot axis 76 of the pivot pin 84.

A mounting seat 88 is formed on one of the connecting portions 80.However, the mounting seat 88 can be formed on another portion of thechain stay 30 other than the connecting portions 80. The mounting seat88 can be formed integrally with the corresponding chain stay 30 orattached to the chain stay 30 by a fastener or by welding. The mountingseat 88 is designed so that a mounting member 92 of the front derailleur54 is attached to the mounting seat 88, which is described below.

In this embodiment, the mounting seat 88 includes an elongated recess 96and a threaded hole 100, which are spaced apart in the longitudinaldirection of the bicycle 10. The mounting seat 88 also includes an upperrecess 102, which includes a first surface 110 and a second surface 114.In this embodiment, both the elongated recess 96 and the threaded hole100 are located on a front side of the pivot axis 76 in the longitudinaldirection of the bicycle 10. The elongated recess 96 forms an abuttingportion 98, which is described below. This description sometimes refersto a first frame member 104 and a second frame member 108. In thisembodiment, the first frame member 104 is one of the chain stays 30 ofthe bicycle frame 22, and the second frame member 108 is the seat tube26 of the bicycle frame 22. However, the second frame member 108 is notlimited to the seat tube 26. The second frame member 108 can be anotherframe member that is pivotally connected to the first frame member 104,which is one of the chain stays 30. Thus, the mounting member 92 isconfigured to be mounted to a connecting portion 80 of the first framemember 104.

FIG. 3 illustrates the front derailleur 54 aligned with the mountingseat 88. The front derailleur 54 includes a chain guide 112, themounting member 92, and a linkage assembly 116 that pivotally couplesthe mounting member 92 to the chain guide 112. The details of thelinkage assembly 116 are well known and thus not described in detail.Basically, pulling movement of a control cable 120 causes the linkageassembly 116 to move the chain guide 112 to an extended position (awayfrom the center plane 56 in FIG. 3). Releasing movement of the controlcable 120 permits the chain guide 112 to return to a retracted position(toward the center plane 56) under the force of a return spring (notshown). The mounting member 92 remains stationary during movement of thechain guide 112 with respect to the first frame member 108 and serves asa fixed base for the front derailleur 54. A well-known shift controller(not illustrated) for pulling and releasing the control cable 120 islocated on the handlebars 18, for example.

In the illustrated embodiment of FIG. 3, the mounting member 92 isgenerally plate-like and includes an attachment portion 124 (See FIG.4). The attachment portion 124 is an elongated opening 128 extending ina longitudinal direction of the second frame member 108 when themounting member 92 is mounted to the first frame member 104. Theelongation of the elongated opening 128 allows the vertical position ofthe derailleur 54 to be adjusted. As shown in FIGS. 3 and 4, theattachment portion 124 extends below the chain guide 112. Further, theattachment portion 124 is located on a front side of the most front endpoint of an outer plate of the chain guide 112 in a longitudinaldirection of the bicycle 10. More preferably, the attachment portion 124is located on a front side of a bearing (not shown in the drawings) topivotally connect the connecting portion 80 and the second frame memberin the longitudinal direction of the bicycle 10. In other words, thethreaded hole 100 is located on a front side of the bearing. The shapeof the attachment portion 124 is not limited to the elongated opening.Further, more than two openings, which are aligned in a direction of alongitudinal axis 58 of the second frame member 108, for example, can bethe attachment portion.

The mounting member 92 further includes an elongated protrusion 132,which corresponds to the elongated recess 96. The protrusion 132protrudes toward the center plane 56. The mounting member 92 forms alower part of the derailleur 54, and the attachment portion 124 islocated below the chain guide 112. A threaded fixing bolt 136 passesthrough the attachment portion 124 and engages the threads of thethreaded hole 100 to fasten the mounting member 92 to the mounting seat88 of the first frame member 104.

The elongated protrusion 132 provides an abutment 140 that abuts againstthe abutting portion 98 that is a part of the first frame member 104 ifthe derailleur 54 rotates about the fixing bolt 136. In other words, theabutment 140 prevents rotation of the mounting member 92 about thefixing bolt 136. The abutment 140 extends generally in the direction ofa longitudinal axis 58 of the seat tube 26, which permits verticaladjustment of the position of the derailleur 54 when the derailleur 54is attached to the first frame member 104 of the bicycle 10. Theabutment 140 is configured to be located on a front side of the pivotaxis 76 when the mounting member 92 is mounted to the first frame member104. Preferably, the abutment 140 is configured to be located on thefront side of the frontmost end point of the outer plate of the chainguide 112 in the longitudinal direction of the bicycle 10. Thus, in thisembodiment, the abutment 140 is located between the frontmost end pointof the outer plate of the chain guide 112 and the attachment portion 124in the longitudinal direction of the bicycle 10. However, the abutment140 can be located on the front side of the attachment portion 124, ifneeded or desired. Further, the abutment 140 can be located on the rearside of the pivot axis 76 in the longitudinal direction of the bicycle10, if needed or desired.

Although the FIGS. 3-5 show an elongated protrusion 132 on the mountingmember 92 and FIG. 2 shows an elongated recess 96 on the mounting seat88, these parts can be reversed such that the elongated protrusion 132is formed on the mounting seat 88 to protrude toward the mounting member92, and the elongated recess 96 is formed on the mounting member 92 toface the mounting seat 88. Thus, the abutment 140 can be provided by oneof the protrusion 132 or the elongated recess 96 formed on the mountingmember 92, and the abutting portion 98 of the first frame member 104 canbe provided by one of the elongated recess 96 or the protrusion 132formed on the first frame member 104. Regardless of whether the abutment140 is an elongated protrusion 132 or an elongated recess 96, theabutment 140 is integrally formed with the mounting member 92. In otherwords, the abutment is one of a protrusion 132 and an elongated recess96, and the first frame member 104 includes the other of the protrusion132 and the elongated recess 96. The protrusion 132 and the elongatedrecess 96 are configured to engage with one another, and the elongatedrecess 96 extends in a longitudinal direction of the second frame member108 when the mounting member 92 is attached to the first frame member104.

FIG. 4 shows the front derailleur 54 mounted on the first frame member104 by the mounting member 92. In FIG. 4, the front of the bicycle 10 ison the right, and the rear of the bicycle 10 is on the left. Themounting member 92 includes a reinforcement portion 148, which islocated on a rear side of the attachment portion 124. The reinforcementportion 148 strengthens the mounting member 92. The reinforcementportion 148 extends rearward of the attachment portion 124. Preferably,the reinforcement portion 148 extends downward of the chain guide 112.In the illustrated embodiments, at least part of the reinforcementportion 148 extends rearward of the pivot axis 76. The reinforcementportion 148 is formed without any portion that allows a fixing boltpassing through to fix the mounting member 92 to the first frame member104. In other words, the mounting member 92 is fixed to the first framemember 104 only at the attachment portion 124, which is in front of thepivot axis 76.

FIGS. 3 and 5 show an upper projection 152 formed on the mounting member92. The upper projection 152 includes a third surface 156 and a fourthsurface 160. The upper projection 152 cooperates with the upper recess102 of the mounting seat 88 when the derailleur 54 is mounted on thefirst frame member 104. The third surface 156 of the upper projection152 faces the corresponding first surface 110 of the upper recess 102.The first surface 110 of the upper recess 102 serves to limit thedownward movement of the front derailleur 54 with respect to the firstframe member 104. The fourth surface 160 of the upper projection 152faces the corresponding second surface 114 of the upper recess 102. Thefourth surface 160 of the upper projection 152 can abut against thesecond surface of the upper recess to provide the front derailleur 54with additional stability.

Referring to FIG. 2 the bicycle frame 22 includes a first frame member104 and a second frame member 108, which is configured to be pivotallyconnected to the first frame member 104 about a pivot axis 76. The firstframe member 104 includes a threaded hole 100 through which a fixingbolt 136 for fixing a mounting member 92 of a bicycle front derailleur54 to the first frame member passes 104. The first frame member 104includes an abutting portion 98 configured to restrict rotation of themounting member 92 around the fixing bolt 136 by abutting the mountingmember 92 of the bicycle front derailleur 54. The threaded hole 100 islocated on a front side of the pivot axis 76. Preferably, the firstframe member 104 is a chain stay 30 of the bicycle frame 22, and thesecond frame member 108 is a seat tube 26 of the bicycle frame 22, forexample.

FIGS. 3-6 show the bicycle front derailleur 54, which includes amounting member 92 configured to be mounted to a first frame member 104of a bicycle frame 22. The first frame member 104 is pivotally connectedto a second frame member 108 of the bicycle frame 22 about a pivot axis76. The derailleur 54 further includes a chain guide 112 and a linkageassembly 116 that pivotally couples the mounting member 92 to the chainguide 112. The mounting member 92 includes an attachment portion 124through which a fixing bolt 136 passes for fixing the mounting member 92to the first frame member 104. The mounting member 92 further includesan abutment 140 configured to restrict rotation of the mounting member92 around the fixing bolt 136 by abutting the first frame member 104.The attachment portion 124 is configured to be located on a front sideof the pivot axis 76 when the mounting member 92 is mounted to the firstframe member 104.

In a second embodiment of the front derailleur 54, as shown in FIGS.7-9, a mounting member 200 of the front derailleur 54 has an attachmentportion 204 that includes an elongated opening 206 like that of theembodiment of FIGS. 3-5. However, the mounting member 200 lacks theelongated protrusion 132 of the embodiment of FIGS. 3-5. In thedescription of the second embodiment, parts that are the same oressentially the same as those of the first embodiment maybe designatedby the reference numbers of the corresponding parts of the firstembodiment.

FIG. 6 is like FIG. 2 except that FIG. 6 shows portions of the bicycleframe 22 in a second embodiment of the bicycle frame 22. FIG. 6 shows amounting seat 208, which is formed on one of the connecting portions 80of the first frame member 104. As in the first embodiment of FIGS. 3-5,the mounting seat 208 can be formed integrally with a connecting portion80 of the first frame member 104 or attached separately by a fastener orby welding. The mounting seat 208 is designed so that the mountingmember 200 of the front derailleur 54 is attached to the mounting seat208.

The mounting seat 208 of FIG. 6 to which the mounting member 200 of thesecond embodiment is attached differs slightly from the mounting seat 88of FIG. 2. The mounting seat 208 includes a first threaded hole 212 anda second threaded hole 216, which are spaced apart in the generaldirection of the axis 58 of the seat tube. The mounting seat 208 alsoincludes the upper recess 102, which is essentially the same as that ofthe embodiment of FIGS. 3-5. In the second embodiment, both the firstthreaded hole 212 and the second threaded hole 216 are located in frontof the pivot axis 76. Preferably, both the first threaded hole 212 andthe second threaded hole 216 are located on a front side of the bearing(not shown in the drawings) to pivotally connect the connecting portion80 and the second frame member 108 in the longitudinal direction of thebicycle 10.

FIG. 7 shows the front derailleur 54 of the second embodiment inalignment with the mounting seat 208 of the first frame member 104. FIG.8 shows the front derailleur 54 mounted on the first frame member 104 bythe mounting member 200 of the second embodiment. As shown in FIGS. 8and 9, the elongated opening 206 forms a first attachment portion 202and a second attachment portion 204. In this embodiment, a first fixingbolt 220 and a second fixing bolt 224 pass through the first attachmentportion 202 and the second attachment portion 204, respectively, tofasten the front derailleur 54 to the first frame member 104. The firstfixing bolt 220 and the second fixing bolt 224 are threaded, and thethreads of the first and second fixing bolts 220, 224 engage the threadsof the first and second threaded bores 212, 216, respectively, to securethe mounting member 200 to the first frame member 104. Although thefirst attachment portion 202 and the second attachment portion 204 areformed by a single elongated opening 206 in the embodiment of FIGS. 7-9,the first and second attachment portions 202, 204 can be formed by twoseparate elongated openings that are spaced apart in the direction ofthe axis 58 of the seat tube 26. The position of the elongated opening206 relative to the first and second threaded bores 212, 216 is adjustedin a direction parallel to the center axis 58 when the mounting member200 is mounted to the first frame member 104.

Like the mounting member 92 of the first embodiment, the mounting member200 of the second embodiment includes the upper projection 152, whichcooperates with the upper recess 102 in the manner described inconnection with the first embodiment.

Thus, FIG. 6 shows a bicycle frame including a second frame member 108and a first frame member 104 configured to be pivotally connected to thesecond frame member 108 about a pivot axis 76. The second frame member108 includes a bottom bracket hanger 60 to which a bottom bracket 32 isattached. The first frame member 104 includes a first threaded hole 212through which a first fixing bolt 220 for fixing a mounting member 200of a bicycle front derailleur 54 to the first frame member 104 passesand includes second threaded hole 216 through which a second fixing bolt224 for fixing the mounting member 200 of the bicycle front derailleur54 to the first frame member 104 passes. The first and second threadedholes 212, 216 are located on a front side of the pivot axis 76.Preferably, the first frame member 104 is a chain stay 30 of the bicycleframe 22, and the second frame member 108 is a seat tube 26 of thebicycle frame 22, for example.

FIGS. 7-9 show a bicycle front derailleur includes a mounting member 200configured to be mounted to a first frame member 104 of a bicycle frame22. The first frame member 104 is pivotally connected to the secondframe member 108 of the bicycle frame 22 about a pivot axis 76. Thesecond frame member 108 includes a bottom bracket hanger 60, to which abottom bracket 32 is attached, and a chain guide 112. The frontderailleur 54 further includes a linkage assembly 116 that pivotallycouples the mounting member 200 to the chain guide 112. The mountingmember 200 includes a first attachment portion 202 through which a firstfixing bolt 220 for fixing the mounting member 200 to the first framemember 104 passes and includes a second attachment portion 204 throughwhich a second fixing bolt 224 for fixing the mounting member 200 to thefirst frame member 104 passes. The first and second fixing bolts 220,224 are configured to be located on a front side of the pivot axis 76,when the mounting member 200 is mounted to the first frame member 104.

FIGS. 10 and 11 show a third embodiment of the front derailleur 54. Inthe description of the third embodiment, parts that are the same oressentially the same as those of the first embodiment may be designatedby the reference numbers of the corresponding parts of the firstembodiment.

The third embodiment of FIGS. 10 and 11 is similar to the firstembodiment of FIGS. 2-5 except that a frame 226 includes a supportmember 228 extending upward and rearward from the bottom bracket hanger60. The pivot joint 72 is located at an end of the support member 228 asshown, for example. The pivot pin 84 is fixed securely to the supportmember 228 by welding or other secure fastening method. The thirdembodiment illustrates that the pivot joint 72 is not necessarily fixeddirectly to the second frame member 108 but can be indirectly fixed tothe second frame member 108. The angle and position of the supportmember 228 can be varied from that shown in FIGS. 10 and 11 according tothe particular frame configuration desired.

While the invention has been described in detail with respect tospecific embodiments, those skilled in the art, upon attaining anunderstanding of the specific embodiments, may readily conceive ofalterations, variations, and equivalents to these embodiments.Accordingly, the scope of the invention should be assessed as that ofthe appended claims and their equivalents.

1. A bicycle front derailleur comprising: a mounting member configuredto be mounted to a first frame member of a bicycle frame, the firstframe member being pivotally connected to a second frame member of thebicycle frame about a pivot axis; a chain guide; and a linkage assemblythat pivotally couples the mounting member to the chain guide, whereinthe mounting member includes an attachment portion through which afixing bolt for fixing the mounting member to the first frame memberpasses and includes an abutment configured to restrict rotation of themounting member around the fixing bolt by abutting the first framemember, the attachment portion is configured to be located on a frontside of the pivot axis when the mounting member is mounted to the firstframe member.
 2. The bicycle front derailleur according to claim 1,wherein the abutment is integrally formed with the mounting member. 3.The bicycle front derailleur according to claim 1, wherein the firstframe member is a chain stay of the bicycle frame, and the second framemember is a seat tube of the bicycle frame.
 4. The bicycle frontderailleur according to claim 1, wherein the attachment portion is anelongated opening extending in a longitudinal direction of the secondframe member when the mounting member is mounted to the first framemember.
 5. The bicycle front derailleur according to claim 4, whereinthe abutment is one of a protrusion and an elongated recess, the firstframe member includes the other of the protrusion and the elongatedrecess, the protrusion and the elongated recess are configured to engagewith one another, and the elongated recess extends in a longitudinaldirection of the second frame member when the mounting member isattached to the first frame member.
 6. The bicycle front derailleuraccording to claim 1, wherein the abutment is configured to be locatedon a front side of the pivot axis when the mounting member is mounted tothe first frame member.
 7. The bicycle front derailleur according toclaim 1, wherein the mounting member is configured to be mounted to aconnecting portion of the first frame member.
 8. The bicycle frontderailleur according to claim 1, wherein the mounting member includes areinforcement portion, which is located on a rear side of the attachmentportion.
 9. The bicycle front derailleur according to claim 8, whereinthe reinforcement portion is formed without any portion that allows afixing bolt passing through to fix the mounting member to the firstframe member.
 10. The bicycle front derailleur according to claim 1,wherein the attachment portion extends below the chain guide.
 11. Abicycle front derailleur comprising: a mounting member configured to bemounted to a first frame member of a bicycle frame, wherein the firstframe member is pivotally connected to a second frame member of thebicycle frame about a pivot axis, and the second frame member includes abottom bracket hanger to which a bottom bracket is attached; a chainguide; a linkage assembly that pivotally couples the mounting member tothe chain guide, wherein the mounting member includes a first attachmentportion through which a first fixing bolt for fixing the mounting memberto the first frame member passes and includes a second attachmentportion through which a second fixing bolt for fixing the mountingmember to the first frame member passes, and the first and second fixingbolts are configured to be located on a front side of the pivot axis,when the mounting member is mounted to the first frame member.
 12. Abicycle frame comprising: a first frame member and a second frame memberconfigured to be pivotally connected to the first frame member about apivot axis, wherein the first frame member includes a threaded holethrough which a fixing bolt for fixing a mounting member of a bicyclefront derailleur to the first frame member passes and includes anabutting portion configured to restrict rotation of the mounting memberaround the fixing bolt by abutting the mounting member of the bicyclefront derailleur, and the threaded hole is located on a front side ofthe pivot axis.
 13. The bicycle frame according to claim 12, wherein thefirst frame member is a chain stay of the bicycle frame, and the secondframe member is a seat tube of the bicycle frame.
 14. A bicycle framecomprising: a second frame member and a first frame member configured tobe pivotally connected to the second frame member about a pivot axis,wherein the second frame member includes a bottom bracket hanger towhich a bottom bracket is attached, wherein the first frame memberincludes a first threaded hole through which a first fixing bolt forfixing a mounting member of a bicycle front derailleur to the firstframe member passes and includes second threaded hole through which asecond fixing bolt for fixing a the mounting member of the bicycle frontderailleur to the first frame member passes, and the first and secondthreaded holes are located on a front side of the pivot axis.
 15. Thebicycle frame according to claim 14, wherein the first frame member is achain stay of the bicycle frame, and the second frame member is a seattube of the bicycle frame.